It sounds like she may potentially be done with vision therapy by the time that the school actually writes a 504, but I agree with DeeDee that it makes sense to put in a request for a 504 immediately. If it becomes unnecessary later, you can always drop it. Strangely, I thought all of DD's teachers last year were trying to attribute her issues (which are similar to dysgraphia) to a vision issue, and putting pressure on me to take her to a developmental optometrist (when I didn't think that was the issue at all), so you never know what people are going to think.
